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Engineering Laboratory / Fire Research Division

National Fire Research Laboratory

Steel-Concrete Composite Floor Systems Subject to Fire – Phase 2 (Test #1)

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This first experiment was conducted on November 14, 2019 to quantify the performance the 9.1 m x 6.1 m composite floor specimen designed to achieve a 2-hour fire-resistance rating to generate baseline data for current U.S. practice. The fire test bay was situated on the ground floor in the middle edge bay of the test building, and the composite floor specimen had the minimum steel reinforcement (6x6 W1.4xW1.4 mesh mat with the distributed area of 60 mm2/m) prescribed for concrete crack control in normal conditions and permitted in standard furnace testing. This specimen was not subjected to controlled cooling nor mechanical loading during the cooling phase of a test fire.

Fire Resilience of a Full-Scale Steel-Concrete Composite Floor System with 2-Hour Fire-Resistance Designed Using U.S. Prescriptive Approach - Experiment Overview
Fire Resilience of a Full-Scale Steel-Concrete Composite Floor System with 2-Hour Fire-Resistance Designed Using U.S. Prescriptive Approach - Experiment Overview
This video shows a time-lapse of a structural-fire experiment conducted at the National Fire Research Laboratory (NFRL). The test structure is a two-story, two-bays by three-bays gravity frame with a story height of 3.3 m. The test bay (at the center of the building) measures 6.1 m by 9.1 m and is hydraulically loaded to service gravity loads. The fire is produced by natural gas-fueled burners with a total maximum capacity of 16 megawatts. A standard fire-resistance test time-temperature curve is used to generate baseline data for current U.S. practice. For more information and other videos, please visit the project website.

DATA

Spreadsheets containing the Test #1 data can be downloaded here (click link).

Video Gallery 

This video shows a time-lapse of a structural-fire experiment conducted at the National Fire Research Laboratory (NFRL) from an isometric front view. The test structure is a two-story, two-bays by three-bays gravity frame with a story height of 3.3 m. The test bay (at the center of the building) measures 6.1 m by 9.1 m and is hydraulically loaded to service gravity loads. The fire is produced by natural gas-fueled burners with a total maximum capacity of 16 megawatts. A standard fire-resistance test time-temperature curve is used to generate baseline data for current U.S. practice. For more information and other videos, please visit the project website. [no audio]
This video shows a time-lapse of a structural-fire experiment conducted at the National Fire Research Laboratory (NFRL) from an isometric view from the west. The test structure is a two-story, two-bays by three-bays gravity frame with a story height of 3.3 m. The test bay (at the center of the building) measures 6.1 m by 9.1 m and is hydraulically loaded to service gravity loads. The fire is produced by natural gas-fueled burners with a total maximum capacity of 16 megawatts. A standard fire-resistance test time-temperature curve is used to generate baseline data for current U.S. practice. For more information and other videos, please visit the project website. [no audio]
This video shows a time-lapse of a structural-fire experiment conducted at the National Fire Research Laboratory (NFRL) of the top of the slab from the east side. The test structure is a two-story, two-bays by three-bays gravity frame with a story height of 3.3 m. The test bay (at the center of the building) measures 6.1 m by 9.1 m and is hydraulically loaded to service gravity loads. The fire is produced by natural gas-fueled burners with a total maximum capacity of 16 megawatts. A standard fire-resistance test time-temperature curve is used to generate baseline data for current U.S. practice. For more information and other videos, please visit the project website.
This video shows a time-lapse of a structural-fire experiment conducted at the National Fire Research Laboratory (NFRL) from the top center of the slab. The test structure is a two-story, two-bays by three-bays gravity frame with a story height of 3.3 m. The test bay (at the center of the building) measures 6.1 m by 9.1 m and is hydraulically loaded to service gravity loads. The fire is produced by natural gas-fueled burners with a total maximum capacity of 16 megawatts. A standard fire-resistance test time-temperature curve is used to generate baseline data for current U.S. practice. For more information and other videos, please visit the project website. [no audio]
This video shows a time-lapse of a structural-fire experiment conducted at the National Fire Research Laboratory (NFRL) from a FLIR camera. The test structure is a two-story, two-bays by three-bays gravity frame with a story height of 3.3 m. The test bay (at the center of the building) measures 6.1 m by 9.1 m and is hydraulically loaded to service gravity loads. The fire is produced by natural gas-fueled burners with a total maximum capacity of 16 megawatts. A standard fire-resistance test time-temperature curve is used to generate baseline data for current U.S. practice. For more information and other videos, please visit the project website. [no audio]
This video shows a time-lapse of a structural-fire experiment conducted at the National Fire Research Laboratory (NFRL) from the interior window camera. The test structure is a two-story, two-bays by three-bays gravity frame with a story height of 3.3 m. The test bay (at the center of the building) measures 6.1 m by 9.1 m and is hydraulically loaded to service gravity loads. The fire is produced by natural gas-fueled burners with a total maximum capacity of 16 megawatts. A standard fire-resistance test time-temperature curve is used to generate baseline data for current U.S. practice. For more information and other videos, please visit the project website. [no audio]
This video shows a time-lapse of a structural-fire experiment conducted at the National Fire Research Laboratory (NFRL) from the interior water-cooled camera. The test structure is a two-story, two-bays by three-bays gravity frame with a story height of 3.3 m. The test bay (at the center of the building) measures 6.1 m by 9.1 m and is hydraulically loaded to service gravity loads. The fire is produced by natural gas-fueled burners with a total maximum capacity of 16 megawatts. A standard fire-resistance test time-temperature curve is used to generate baseline data for current U.S. practice. For more information and other videos, please visit the project website. [no audio]
 
 

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Created November 4, 2021, Updated June 9, 2022